1. School of Business, University of Connecticut, Storrs, Connecticut 06269;
2. Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland;
3. Swiss Finance Institute, 1205 Geneve, Switzerland;
4. Center for Economic Policy Research, London EC1V 0DX, United Kingdom;
5. Smeal College of Business, Penn State University, University Park, Pennsylvania 16802